Running BES 5.0 Server on Domino 8.0.x You Need to Know This

If you have or plan on upgrading your BES Server to 5.0 and running it on a Domino 8.0.x server you want to be aware of SDR 287348

In a Lotus Domino version 8.0 environment, the BlackBerry Messaging Agent might take longer than expected to send messages and calendar items to BlackBerry devices, and in certain circumstances, BlackBerry devices might not activate with the BlackBerry Enterprise Server. This issue impacts users whose mail file path in the operating system has a different case than the mail file path specified in the person document. Workaround Perform one of the following workarounds: (1) Verify that the mail file path for users in the operating system is the same as the mail file path for those users specified in the person document. (2) In HKEY_LOCAL_MACHINESOFTWAREResearch In MotionBlackBerry Enterprise ServerAgents, change the DWORD value PollByMailServer to 0.

This information can be found in the Blackberry Enterprise Server for IBM Lotus Domino Version 5.0 Release Notes